Infrared spectra of some oxides of K2NiF4 and related structures

Singh, KK and Ganguly, P (1984) Infrared spectra of some oxides of K2NiF4 and related structures. In: Spectrochimica Acta Part A: Molecular Spectroscopy, 40 (6). pp. 539-545.

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Abstract

The i.r. spectra of some Ln2BO4 and LnSrBO4 compounds (Ln = La, Pr, Nd, Sm or Gd;B = Fe, Al, Co or Cu) with K2NiF4 or related structures have been studied in the range 800-300 cm−1. The BO6 octahedra in compounds with K2NiF4 structure are elongated. The assignment of the bands in terms of internal modes of sheets of bridged BO6 octahedra or square-planar BO4 sheets has been considered. The observed spectra are correlated with those of solid solutions of these oxides and of LnBO3 perovskites. Unusually high stretching frequencies found in some of the oxides are discussed in terms of the short B---O bonds in the basal plane and the Ln---O bonds along the c axis.

Item Type:	Journal Article
Publication:	Spectrochimica Acta Part A: Molecular Spectroscopy
Publisher:	Elsevier science
Additional Information:	Copyright for this article belongs to Elsevier science.
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	01 Feb 2010 06:03
Last Modified:	19 Sep 2010 05:43
URI:	http://eprints.iisc.ac.in/id/eprint/22883

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